Chemistry, 24.07.2021 08:50 hunterwilliams375
Four atoms and/or ions are sketched below in accordance with their relative atomic and/or ionic radii. Which of the following sets of species are compatible with the sketch?
Explain. (a) C, Ca2+,Cl−,Br−;
(b) Sr4, Cl, Br−,Na+
(d) Al, Ra2+,Zr2+
(c) Y, K,Ca, Na+, Mg2+;
e) Fe, Rb, Co, Cs
Answers: 3
Chemistry, 23.06.2019 11:40, missmontgomery21
Which of the following observations indicates that an atom has neutrons? some uncharged particles are scattered by a beryllium atom when it hits a gold foil. some uncharged particles bounce back from a gold foil when it is bombarded with alpha particles. a radiation consisting of uncharged particles is emitted when alpha particles strike beryllium atoms. a radiation which attracts electrons is produced when a beryllium atom is bombarded with alpha particles.
Answers: 2
Chemistry, 23.06.2019 13:30, jcastronakaya
The zinc within a copper-plated penny dissolves in hydrochloric acid if the copper coating is filed down in several spots (so that the hydrochloric acid can reach the zinc). the reaction between the acid and the zinc 2h+(aq)+zn(s)→h2(g)+zn2+(aq) . when the zinc in a certain penny dissolves, the total volume of gas collected over water at 25 °c is 0.947 l at a total pressure of 743 mmhg . (vapor pressure of water is 23.78 mmhg at 25 °c .) what mass of hydrogen gas is collected? answer in appropriate significant figures
Answers: 3
Four atoms and/or ions are sketched below in accordance with their relative atomic and/or ionic radi...
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